A proper double lung hit with a GOOD (non-mechanical ie:fall apart heads) broadhead should drop a grizzly fairly quickly considering the huge cut they make, however the 10 seconds or so that it lives, it can do a world or hurt on you. I've been told, although I do not know if this is true, that a grizzly's heart beats about 8 times a minute. Just how quickly do you think he'll bleed out?

I would NEVER attempt to hunt grizzlies or browns with a bow - on purpose - more of a trick I'd think, than hunting. Kinda like going after the big cats with a .243?

I would guess that most bow and arrow grizzlies, whether inland of coastal (browns) are killed by the guide and outfitter.

Black bears fine - if I had a rifleman or fellow with a shotgun (slugs) backup, however, I'd rather shoot a black bear with a .22-250 and Prem. bullet, than with a bow.